Perhaps you should try some spelling variations:
sach tham » sach nha
tham bang » thai bang, tham lang, thuat bang
toc sach » hoc sach, doc sach, thuoc sach
bang cac » nang cao, hang ca, dung cac
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
qua cao » qua cac, qua ca, qua cai
cac hoa » cac hoat, cac khoa, cau hoa
xuc va » duc va, luc va
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tham bang cac hoa. hieu qua cao ((((xuc va) OR (xac va))) or (tuc va)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tham bang cac hoa. hieu qua cao ((((xuc va) OR (xac va))) OR (tuc va)) hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tham bang cac hoa. hieu qua cao ((((xuc va) OR (xac va))) or (tuc va)) hanh tai cua tre*".